All ATS transmissions are designed to handle extreme power and heavy loads, and then dyno tested to ensure reliable functionality and high performance. ATS transmissions eliminate the factory weaknesses and design flaws, replacing them with engineering that works. They are so confident of that, all ATS transmissions are backed by the only 5-year, 500,000 mile warranty in the industry. This rebuilt ATS high performance transmissions includes the following features fully re-manufactured dyno tested ATS High Performance Valve Body, High Volume Pump, Heavy Duty Gear Train, Extreme Duty Clutch Pack, Other proprietary internal components, High stress areas of case are reinforced, Critical bolt and thread holes are inserted, Valve Body surface is machined flat, Redesigned and calibrated hydraulic system, and the External surface of case is sealed. Shipping charge includes shipping your new transmission, and shipping your old transmission back to ATS so you can be refunded for the core charge.